Application

To meet today’s secondary treatment effluent limits being discharged from domestic wastewater, an advanced secondary wastewater treatment processes is used to meet those conditions. The TIPTON secondary treatment system is available for those design flow rates up to 500,000 GPD. The most common applications this system is used with is our lift stations or flow equalization systems. The process is called an activated sludge type extended aeration process.

Process

The purpose of the secondary treatment system is to oxidize the BOD5 and suspended solids of a waste stream to an effluent being discharged of approximately 90% of the incoming influent. This process is considered the secondary treatment process. Simple, but very effective -the plant operator can run the settleability test to monitor the operation of the system. Over a one hour period will measure the mixed liquor solids within the aeration zone and plot them on the ideal curve. If the solid level is very low the blowers are running for too long of a period and vice-versa. The more air the less solids, the less air the more solids. The operator will want to maintain approximately 40% solids in the aeration chamber over a 30 minute period. This process involves providing the exact amount of air for the food to micro requirements.

The extended aeration process, which occurs in the aeration chamber, oxidizes the sewage by the destruction of the organic compounds using air to mix and oxidize the volatile material into gas, water, carbon and sludge. By the continued aeration of these concentrated solids, biological organisms are produced and grow in colonies. These colonies, known as flock, will attach themselves to the volatile materials breaking it down into water, carbon dioxide and ash. The result being a clear and odor-free effluent. The same thing happens in streams and rivers. When waste enters a stream, the dissolved oxygen in water decreases and the bacterial population increases. As the wastewater moves down stream, the bacteria will consume all organic material in time.

The TIPTON system is a prefabricated factory-built unit complete and ready for easy installation at the project site.

Operation

The flow diagram below shows the return activated sludge being returned from the bottom of the clarifier to the aeration chamber for further treatment. The clear liquid within the clarifier chamber to pass over the weir and discharge as treated effluent.

Unique Features

The TIPTON secondary treatment system features a compact design, automatic air control system, quality components ideal for retro-fitting, ease of installation, and simple operation.